summaryrefslogtreecommitdiffstats
path: root/system/helpers/url_helper.php
blob: f5a880c9bda9ec1b0fa189fe25aa3e706d038000 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
<?php
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 5.2.4 or newer
 *
 * NOTICE OF LICENSE
 *
 * Licensed under the Open Software License version 3.0
 *
 * This source file is subject to the Open Software License (OSL 3.0) that is
 * bundled with this package in the files license.txt / license.rst.  It is
 * also available through the world wide web at this URL:
 * http://opensource.org/licenses/OSL-3.0
 * If you did not receive a copy of the license and are unable to obtain it
 * through the world wide web, please send an email to
 * licensing@ellislab.com so we can send you a copy immediately.
 *
 * @package		CodeIgniter
 * @author		EllisLab Dev Team
 * @copyright	Copyright (c) 2008 - 2014, EllisLab, Inc. (http://ellislab.com/)
 * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
 * @link		http://codeigniter.com
 * @since		Version 1.0
 * @filesource
 */
defined('BASEPATH') OR exit('No direct script access allowed');

/**
 * CodeIgniter URL Helpers
 *
 * @package		CodeIgniter
 * @subpackage	Helpers
 * @category	Helpers
 * @author		EllisLab Dev Team
 * @link		http://codeigniter.com/user_guide/helpers/url_helper.html
 */

// ------------------------------------------------------------------------

if ( ! function_exists('site_url'))
{
	/**
	 * Site URL
	 *
	 * Create a local URL based on your basepath. Segments can be passed via the
	 * first parameter either as a string or an array.
	 *
	 * @param	string	$uri
	 * @param	string	$protocol
	 * @return	string
	 */
	function site_url($uri = '', $protocol = NULL)
	{
		return get_instance()->config->site_url($uri, $protocol);
	}
}

// ------------------------------------------------------------------------

if ( ! function_exists('base_url'))
{
	/**
	 * Base URL
	 *
	 * Create a local URL based on your basepath.
	 * Segments can be passed in as a string or an array, same as site_url
	 * or a URL to a file can be passed in, e.g. to an image file.
	 *
	 * @param	string	$uri
	 * @param	string	$protocol
	 * @return	string
	 */
	function base_url($uri = '', $protocol = NULL)
	{
		return get_instance()->config->base_url($uri, $protocol);
	}
}

// ------------------------------------------------------------------------

if ( ! function_exists('current_url'))
{
	/**
	 * Current URL
	 *
	 * Returns the full URL (including segments) of the page where this
	 * function is placed
	 *
	 * @return	string
	 */
	function current_url()
	{
		$CI =& get_instance();
		return $CI->config->site_url($CI->uri->uri_string());
	}
}

// ------------------------------------------------------------------------

if ( ! function_exists('uri_string'))
{
	/**
	 * URL String
	 *
	 * Returns the URI segments.
	 *
	 * @return	string
	 */
	function uri_string()
	{
		return get_instance()->uri->uri_string();
	}
}

// ------------------------------------------------------------------------

if ( ! function_exists('index_page'))
{
	/**
	 * Index page
	 *
	 * Returns the "index_page" from your config file
	 *
	 * @return	string
	 */
	function index_page()
	{
		return get_instance()->config->item('index_page');
	}
}

// ------------------------------------------------------------------------

if ( ! function_exists('anchor'))
{
	/**
	 * Anchor Link
	 *
	 * Creates an anchor based on the local URL.
	 *
	 * @param	string	the URL
	 * @param	string	the link title
	 * @param	mixed	any attributes
	 * @return	string
	 */
	function anchor($uri = '', $title = '', $attributes = '')
	{
		$title = (string) $title;

		$site_url = is_array($uri)
			? site_url($uri)
			: preg_match('#^(\w+:)?//#i', $uri) ? $uri : site_url($uri);

		if ($title === '')
		{
			$title = $site_url;
		}

		if ($attributes !== '')
		{
			$attributes = _stringify_attributes($attributes);
		}

		return '<a href="'.$site_url.'"'.$attributes.'>'.$title.'</a>';
	}
}

// ------------------------------------------------------------------------

if ( ! function_exists('anchor_popup'))
{
	/**
	 * Anchor Link - Pop-up version
	 *
	 * Creates an anchor based on the local URL. The link
	 * opens a new window based on the attributes specified.
	 *
	 * @param	string	the URL
	 * @param	string	the link title
	 * @param	mixed	any attributes
	 * @return	string
	 */
	function anchor_popup($uri = '', $title = '', $attributes = FALSE)
	{
		$title = (string) $title;
		$site_url = preg_match('#^(\w+:)?//#i', $uri) ? $uri : site_url($uri);

		if ($title === '')
		{
			$title = $site_url;
		}

		if ($attributes === FALSE)
		{
			return '<a href="'.$site_url.'" onclick="window.open(\''.$site_url."', '_blank'); return false;\">".$title.'</a>';
		}

		if ( ! is_array($attributes))
		{
			$attributes = array($attributes);

			// Ref: http://www.w3schools.com/jsref/met_win_open.asp
			$window_name = '_blank';
		}
		elseif ( ! empty($attributes['window_name']))
		{
			$window_name = $attributes['window_name'];
			unset($attributes['window_name']);
		}
		else
		{
			$window_name = '_blank';
		}

		foreach (array('width' => '800', 'height' => '600', 'scrollbars' => 'yes', 'menubar' => 'yes', 'status' => 'yes', 'resizable' => 'yes', 'screenx' => '0', 'screeny' => '0') as $key => $val)
		{
			$atts[$key] = isset($attributes[$key]) ? $attributes[$key] : $val;
			unset($attributes[$key]);
		}

		$attributes = _stringify_attributes($attributes);

		return '<a href="'.$site_url
			.'" onclick="window.open(\''.$site_url."', '".$window_name."', '"._stringify_attributes($atts, TRUE)."'); return false;\""
			.$attributes.'>'.$title.'</a>';
	}
}

// ------------------------------------------------------------------------

if ( ! function_exists('mailto'))
{
	/**
	 * Mailto Link
	 *
	 * @param	string	the email address
	 * @param	string	the link title
	 * @param	mixed	any attributes
	 * @return	string
	 */
	function mailto($email, $title = '', $attributes = '')
	{
		$title = (string) $title;

		if ($title === '')
		{
			$title = $email;
		}

		return '<a href="mailto:'.$email.'"'._stringify_attributes($attributes).'>'.$title.'</a>';
	}
}

// ------------------------------------------------------------------------

if ( ! function_exists('safe_mailto'))
{
	/**
	 * Encoded Mailto Link
	 *
	 * Create a spam-protected mailto link written in Javascript
	 *
	 * @param	string	the email address
	 * @param	string	the link title
	 * @param	mixed	any attributes
	 * @return	string
	 */
	function safe_mailto($email, $title = '', $attributes = '')
	{
		$title = (string) $title;

		if ($title === '')
		{
			$title = $email;
		}

		$x = str_split('<a href="mailto:', 1);

		for ($i = 0, $l = strlen($email); $i < $l; $i++)
		{
			$x[] = '|'.ord($email[$i]);
		}

		$x[] = '"';

		if ($attributes !== '')
		{
			if (is_array($attributes))
			{
				foreach ($attributes as $key => $val)
				{
					$x[] = ' '.$key.'="';
					for ($i = 0, $l = strlen($val); $i < $l; $i++)
					{
						$x[] = '|'.ord($val[$i]);
					}
					$x[] = '"';
				}
			}
			else
			{
				for ($i = 0, $l = strlen($attributes); $i < $l; $i++)
				{
					$x[] = $attributes[$i];
				}
			}
		}

		$x[] = '>';

		$temp = array();
		for ($i = 0, $l = strlen($title); $i < $l; $i++)
		{
			$ordinal = ord($title[$i]);

			if ($ordinal < 128)
			{
				$x[] = '|'.$ordinal;
			}
			else
			{
				if (count($temp) === 0)
				{
					$count = ($ordinal < 224) ? 2 : 3;
				}

				$temp[] = $ordinal;
				if (count($temp) === $count)
				{
					$number = ($count === 3)
							? (($temp[0] % 16) * 4096) + (($temp[1] % 64) * 64) + ($temp[2] % 64)
							: (($temp[0] % 32) * 64) + ($temp[1] % 64);
					$x[] = '|'.$number;
					$count = 1;
					$temp = array();
				}
			}
		}

		$x[] = '<'; $x[] = '/'; $x[] = 'a'; $x[] = '>';

		$x = array_reverse($x);

		$output = "<script type=\"text/javascript\">\n"
			."\t//<![CDATA[\n"
			."\tvar l=new Array();\n";

		for ($i = 0, $c = count($x); $i < $c; $i++)
		{
			$output .= "\tl[".$i."] = '".$x[$i]."';\n";
		}

		$output .= "\n\tfor (var i = l.length-1; i >= 0; i=i-1) {\n"
			."\t\tif (l[i].substring(0, 1) === '|') document.write(\"&#\"+unescape(l[i].substring(1))+\";\");\n"
			."\t\telse document.write(unescape(l[i]));\n"
			."\t}\n"
			."\t//]]>\n"
			.'</script>';

		return $output;
	}
}

// ------------------------------------------------------------------------

if ( ! function_exists('auto_link'))
{
	/**
	 * Auto-linker
	 *
	 * Automatically links URL and Email addresses.
	 * Note: There's a bit of extra code here to deal with
	 * URLs or emails that end in a period. We'll strip these
	 * off and add them after the link.
	 *
	 * @param	string	the string
	 * @param	string	the type: email, url, or both
	 * @param	bool	whether to create pop-up links
	 * @return	string
	 */
	function auto_link($str, $type = 'both', $popup = FALSE)
	{
		// Find and replace any URLs.
		if ($type !== 'email' && preg_match_all('#(\w*://|www\.)[^\s()<>;]+\w#i', $str, $matches, PREG_OFFSET_CAPTURE | PREG_SET_ORDER))
		{
			// Set our target HTML if using popup links.
			$target = ($popup) ? ' target="_blank"' : '';

			// We process the links in reverse order (last -> first) so that
			// the returned string offsets from preg_match_all() are not
			// moved as we add more HTML.
			foreach (array_reverse($matches) as $match)
			{
				// $match[0] is the matched string/link
				// $match[1] is either a protocol prefix or 'www.'
				//
				// With PREG_OFFSET_CAPTURE, both of the above is an array,
				// where the actual value is held in [0] and its offset at the [1] index.
				$a = '<a href="'.(strpos($match[1][0], '/') ? '' : 'http://').$match[0][0].'"'.$target.'>'.$match[0][0].'</a>';
				$str = substr_replace($str, $a, $match[0][1], strlen($match[0][0]));
			}
		}

		// Find and replace any emails.
		if ($type !== 'url' && preg_match_all('#([\w\.\-\+]+@[a-z0-9\-]+\.[a-z0-9\-\.]+[^[:punct:]\s])#i', $str, $matches, PREG_OFFSET_CAPTURE))
		{
			foreach (array_reverse($matches[0]) as $match)
			{
				if (filter_var($match[0], FILTER_VALIDATE_EMAIL) !== FALSE)
				{
					$str = substr_replace($str, safe_mailto($match[0]), $match[1], strlen($match[0]));
				}
			}
		}

		return $str;
	}
}

// ------------------------------------------------------------------------

if ( ! function_exists('prep_url'))
{
	/**
	 * Prep URL
	 *
	 * Simply adds the http:// part if no scheme is included
	 *
	 * @param	string	the URL
	 * @return	string
	 */
	function prep_url($str = '')
	{
		if ($str === 'http://' OR $str === '')
		{
			return '';
		}

		$url = parse_url($str);

		if ( ! $url OR ! isset($url['scheme']))
		{
			return 'http://'.$str;
		}

		return $str;
	}
}

// ------------------------------------------------------------------------

if ( ! function_exists('url_title'))
{
	/**
	 * Create URL Title
	 *
	 * Takes a "title" string as input and creates a
	 * human-friendly URL string with a "separator" string
	 * as the word separator.
	 *
	 * @todo	Remove old 'dash' and 'underscore' usage in 3.1+.
	 * @param	string	$str		Input string
	 * @param	string	$separator	Word separator
	 *			(usually '-' or '_')
	 * @param	bool	$lowercase	Wether to transform the output string to lowercase
	 * @return	string
	 */
	function url_title($str, $separator = '-', $lowercase = FALSE)
	{
		if ($separator === 'dash')
		{
			$separator = '-';
		}
		elseif ($separator === 'underscore')
		{
			$separator = '_';
		}

		$q_separator = preg_quote($separator, '#');

		$trans = array(
			'&.+?;'			=> '',
			'[^a-z0-9 _-]'		=> '',
			'\s+'			=> $separator,
			'('.$q_separator.')+'	=> $separator
		);

		$str = strip_tags($str);
		foreach ($trans as $key => $val)
		{
			$str = preg_replace('#'.$key.'#i', $val, $str);
		}

		if ($lowercase === TRUE)
		{
			$str = strtolower($str);
		}

		return trim(trim($str, $separator));
	}
}

// ------------------------------------------------------------------------

if ( ! function_exists('redirect'))
{
	/**
	 * Header Redirect
	 *
	 * Header redirect in two flavors
	 * For very fine grained control over headers, you could use the Output
	 * Library's set_header() function.
	 *
	 * @param	string	$uri	URL
	 * @param	string	$method	Redirect method
	 *			'auto', 'location' or 'refresh'
	 * @param	int	$code	HTTP Response status code
	 * @return	void
	 */
	function redirect($uri = '', $method = 'auto', $code = NULL)
	{
		if ( ! preg_match('#^(\w+:)?//#i', $uri))
		{
			$uri = site_url($uri);
		}

		// IIS environment likely? Use 'refresh' for better compatibility
		if ($method === 'auto' && isset($_SERVER['SERVER_SOFTWARE']) && strpos($_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS') !== FALSE)
		{
			$method = 'refresh';
		}
		elseif ($method !== 'refresh' && (empty($code) OR ! is_numeric($code)))
		{
			if (isset($_SERVER['SERVER_PROTOCOL'], $_SERVER['REQUEST_METHOD']) && $_SERVER['SERVER_PROTOCOL'] === 'HTTP/1.1')
			{
				$code = ($_SERVER['REQUEST_METHOD'] !== 'GET')
					? 303	// reference: http://en.wikipedia.org/wiki/Post/Redirect/Get
					: 307;
			}
			else
			{
				$code = 302;
			}
		}

		switch ($method)
		{
			case 'refresh':
				header('Refresh:0;url='.$uri);
				break;
			default:
				header('Location: '.$uri, TRUE, $code);
				break;
		}
		exit;
	}
}

/* End of file url_helper.php */
/* Location: ./system/helpers/url_helper.php */